But if you wipe a lifter on a fresh build with 150 miles and it takes out the cam lobe and then sends metal shavings or pieces throughout the engine which could take out the oil pump, bearings and scratch or damage cylinder walls and piston skirts etc.LOL, l've had that car for 20 years and the engine for half again, if l put 200 miles a year on one of them cars l'd be amazed.
So a roller system isn't so much of an issue and l can see an issue trying to find a roller lifter set up here, 3 weeks later!! Lol
By the time you replace the cam, lifters, bearings, gaskets etc. and clean and re prep the block you have already paid for a roller cam except you won't have one and you will again be hoping for the best on the new flat tappet cam. Just my opinion others may vary.